@nent/core/dist/cjs/index-637e8c28.js

Functional elements to add routing, data-binding, dynamic HTML, declarative actions, audio, video, and so much more. Supercharge static HTML files into web apps without script or builds.

/*!
 * NENT 2022
 */
'use strict';

/* istanbul ignore file */
class EventEmitter {
  constructor() {
    this.events = {};
    this.wildcardEvents = [];
  }
  recalcWildcardEvents() {
    const newWildCardEvents = [];
    for (const i in this.events) {
      if (i.endsWith('*') &&
        this.events[i] &&
        this.events[i].length > 0) {
        newWildCardEvents.push(i);
      }
    }
    this.wildcardEvents = newWildCardEvents;
  }
  on(event, listener) {
    if (typeof this.events[event] !== 'object') {
      this.events[event] = [];
    }
    this.events[event].push(listener);
    this.recalcWildcardEvents();
    return () => {
      this.removeListener(event, listener);
    };
  }
  removeListener(event, listener) {
    if (typeof this.events[event] !== 'object') {
      return;
    }
    const idx = this.events[event].indexOf(listener);
    if (idx > -1) {
      this.events[event].splice(idx, 1);
    }
    this.recalcWildcardEvents();
  }
  removeAllListeners() {
    Object.keys(this.events).forEach((event) => this.events[event].splice(0, this.events[event].length));
    this.recalcWildcardEvents();
  }
  emit(event, ...args) {
    if (typeof this.events[event] === 'object') {
      [...this.events[event]].forEach(listener => {
        listener.apply(this, args);
      });
    }
    if (event !== '*') {
      this.emit('*', event, ...args);
      return;
    }
    for (const rawWcEvent of this.wildcardEvents) {
      const wcEvent = rawWcEvent.slice(0, rawWcEvent.endsWith('.*') ? -2 : -1);
      if (!event.endsWith('*') &&
        event !== wcEvent &&
        event.startsWith(wcEvent)) {
        this.emit(rawWcEvent, event, ...args);
      }
    }
  }
  once(event, listener) {
    const remove = this.on(event, (...args) => {
      remove();
      listener.apply(this, args);
      this.recalcWildcardEvents();
    });
    return remove;
  }
  destroy() {
    this.removeAllListeners();
  }
}

const actionBus = new EventEmitter();
const eventBus = new EventEmitter();

exports.EventEmitter = EventEmitter;
exports.actionBus = actionBus;
exports.eventBus = eventBus;